Chemistry of inorganic compounds – Phosphorus or compound thereof – Oxygen containing
Patent
1995-05-09
1996-07-02
Langel, Wayne
Chemistry of inorganic compounds
Phosphorus or compound thereof
Oxygen containing
4231573, 423490, C01B 2522, C01F 1122
Patent
active
055319750
ABSTRACT:
Fluosilicic acid is reacted with phosphate rock in order to produce wet process phosphoric acid and calcium fluoride which is later reacted with sulfuric acid to produce hydrogen fluoride and calcium sulfate. The hydrogen fluoride is then stripped from the phosphoric acid and recovered as either anhydrous hydrogen fluoride or concentrated hydrofluoric acid or reacted with aluminum trihydrate to produce aluminum fluoride; with sodium carbonate to produce sodium fluoride/bifluoride; or with ammonia to produce ammonium fluoride/bifluoride.
REFERENCES:
patent: 1313379 (1919-08-01), Heckenbleikner
patent: 2398135 (1943-09-01), Frey
patent: 2456509 (1948-12-01), Hopkins et al.
patent: 2507605 (1950-05-01), Lopker et al.
patent: 2636806 (1953-04-01), Winter
patent: 2702233 (1955-02-01), Mitchell et al.
patent: 2725634 (1955-12-01), Miller
patent: 3323864 (1963-08-01), Lapple
patent: 3811246 (1974-05-01), Erickson
patent: 3825655 (1974-07-01), Eipeltauer et al.
patent: 4557915 (1985-12-01), Nineuil
patent: 4629610 (1986-12-01), Friese et al.
patent: 5180569 (1993-01-01), Erickson et al.
patent: 5427757 (1995-06-01), Erickson et al.
U.S. Dept. of Interior Report of Investigations 8061, Fluosilicic Acid Acidulation of Phosphate Rock, by L. H. Banning, Albany Metallurgy Research Center, Albany, Oregon (1975).
Chemical Abstracts, vol. 84, No. 18, 3 May 1976 (Columbus, Ohio US) H. Lloyd Banning: "Fluosilicic Acid Acidulation of Phosphate Rock," p. 127 abstract No. 123995v, and U.S., Bur. Mines, Rep. Invest. 1975, RI 8061, 13 pages.
Chemical Abstracts 97(21):181101(e).
Chemical Abstracts 78(8):519775.
Bouffard Leif E.
Erickson William R.
Langel Wayne
Phosphate Engineering and Construction Co., Inc.
Shipley James E.
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